Brake mechanism for talking machines



M. NYSTROM.

BRAKE MECHANISM FOR TALKING MACHINES.

APPLICATION FILED AUG-15,1919. 1,406,579. Patented Feb. 14,1922.

2 SHEETS-SHEET I.

M. NYSTROM. BRAKE MECHANISM FOR TALKING MACHINES.

APPLICATION FILED AUG-16,1919.

Patented Feb. 14, 1922.

2 SHEETS-SHEET 2 I I I UNlTED STATES PATENT OFFICE.

MARTIN NYSTEOM, OF CHICAGO, ILLINOIS, ASSIGNOE TO THE BBUNSWICK-BALKE-COLLENDER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

BRAKE MECHANISM FOR TALKING liIACI-IINLES.

cally and quickly stop the motor at a predetermined chlne.

Further ob ects and advantages of my 111- point in the operation of themavention will be pointed out hereafter in the detail description of apreferred embodiment thereof as illustrated in the accompanyingdrawings, in which- Fig. 1 is a perspective View, partly broken away andin section, illustrating my'invention applied to atalking machine motor;

Fig. 2 is-a top plan view; 1

Figs. 3 and 4 are detail views.

Referring to the drawings, 5 is the frame of a talking machine motorprovided with a spindle 6 which projects up through the top plate ormotor board 7 to receive and carry the record table (not shown). Such amotor is customarily supplied with means for regulating the speed-ofrotation of the spindle which include a governor designated generally 8and comprising the drum 9.

Devices (not shown) adapted to be adjusted to position byturning the pin10 are arranged to'engage the drum as the latter moves longitudinally ofthe governor shaft 11 and thus control the speed of rotation of thespindle. This governor mechanism forms the subject-matter of a.companion application Serial No. 317,882, filed August 16,1919. a

A plate 12 is fastened on the top plate or motor board 7 and is providedat one end with a guide finger 13. A spindle 14 is rotatably mounted onthe plate 12 and projects down through an'opening provided for itiin thetop plate or motor board 7. This spindle carries a block 15 providedwith a pin 16 which is engaged by the forked end 1'] of a brake lever 18rotatably supported in the motor frame 5. The brake lever 1s providedwith an arm 19 carrying a pad 20 Specification of Letters Patent.Patented Feb. 14 1922 Application filed August 16, 1919.

Serial No. 317,883.

stop lever of the brake mechanism consists of a front section 24 pivotedto the plate 12 at 25, and a rear section 26 pivoted at 27 to the front.section 24 at the rear end of the latter, back of the pivot 25. Thepivot 27 holds thefront end of the lever section 26 in close frictionalengagement with the rear end of the front lever section 241 so that therear section may be adjusted independently of the front section byoperating the handle 26 to set the brake for action at aparticular pointin the operation of the machine, and yet the two sections will operatein unison as if rigidly connected together when the latch lever is movedto start the motor and when the stop lever is moved to stop the motor.There is a downward projection 28 at the forward end of the frontsection 24 of the stop lever which engages the notch 22 while the motoris running and which engages the shoulder 23 when the motor is notrunning. A pin 29 carried by the tone arm (not shown) of the talkingmachine is arranged to engage the rear end of therear section 26 of thestop lever to swing this lever on its pivot and shift the projection 28from the notch 22 to position against the shoulder 23. A spring 30 isfastened to a lug 31 on the front section 2% of the stop lever and to alug 32 on the latch lever 21,

the said lugs-being positioned with relation to each other so that inthe two positions of "said levers the spring will lie on the same sideof the axis of the spindle 14,.

The front sectlon 24:, which constitutes the locking lever, has alimited range of movewent sufficient only to engage the lug 28 withnotch 22 and this lever is limited in its movement by a lug 12 on theplate 12. The rear section 26. of the lever, which constitutes a settinglever, hasa wide rangeof adjustment independent of the locking leversoethat the mechanism may. be adjusted to stop the machine at any timewithin wide limits of adjustment without inany way affecting theoperation of the locking lever or the latch it being apparent. that thelooking lever and latch always operate within certain fixed limits Whilethe setting lever is proportion of parts and in the details of capableof adjustment within any limits that may be required.

When the setting lever has been set to stop the machine'at apredetermined point, by operating the handle 26', and the record beingin place, the latch lever 21 is thrown to the position shown in Fig. 3,thereby releasing the pad from engagement with the drum and permittingthe motor to operate. At this time the locking lever lug 28 is seated inthe notch 22 of the latch lever to hold the brake pad out of engagementwith the drum so that the motor may freely operate. When the tone armhas moved to engage the pin 29 with the setting lever 26 the latter,operating with the locking lever, as one complete releasing lever, isshifted on the pivot 25 to withdraw lug 28 from notch 22, Whereuponspring 30 pulls the latch lever around to the position shown in Fig. atwith the end of the locking lever 24% in engagement with the shoulder23. Thus the swin ing movement of the latch lever is limited by engageeconstruction may be made without departing from the spirit orsacrificing any of the i advantages of the invention and I thereforereserve the right to make all such changes as fairly fall Within thescope of the following claims.

I claim 1. In a brake mechanism for talking machines, the combination ofa latch lever, braking means connected with and operated by said latchlever for stopping the motor of the m a chine, a locking lever pivotedadjacent its rear end and adapted to engage at ItSTOT- ward end with thelatch lever-to temporarily lock the parts with the brake in operativeposition, a setting leverpivoted at its for? ward end to the rear end ofthe locking lever behind the locking lever pivot, the rear end of saidsetting lever being arranged in the path of a moving part of the machineand actuated thereby, said locking lever and setting lever being frictionally engaged for independent adjustment of the setting lever and forconjoint movement to release the latch and to hold' the brake ininoperative position.

2. In a brake mechanism for talking ma- 1 chines, the combination of alatch level, a 7

pivoted lockin lever adapted to engage at its forward end with the latchlever to temporarily lock the parts with the brake in operativeposition, a setting lever pivoted to the locking lever and arranged inthe path of a moving part of the machine and actuated thereby, saidlocking lever and setting lever being frictionally engaged forindependent adjustment of the setting lever and for conjoint movement torelease the latch and to hold the brake in inoperative position, aspindle operated by said latch lever, a governor mechanism on the motorcomprising a drum, a brake pad arranged to engage the drum to stop themotor, and means operated by said spindle for moving said pad to andfrom engagement with said drum.

3. The combination With the governor of a talking machine motor, saidgovernor comprising a .drum, of a brake pad adapted to engage said drumto stop the motor, an arm carryingsaid pad, arevoluble rod carrying saidarm and having a forked end, a spindle, a block on said spindle, a pinon the block operatively engaged with the forked end of said brake rod,and means for operating said spindle to set or release the brake. I

4. The combinatitonwith the governor of a talking machine motor, saidgovernor comprising a drum, of a bra-ke pad adapted to engagesaid drumto stop the motor, an arm carrying said pad, a rod carrying said armand; having a forked end, a spindle, a block on said'spindlma pin on theblock opera tively engaged with the forked end of said brake rod, alatchleverrigidwith said spindle, a locking lever engaged with saidlatch lever to hold the latch lever, with the brake in set or-releaseposition, -and anadjusting lever arranged in the path of a moving partof the machine to be actuated thereby and connected with the lockinglever for independent operation or for con oint operation with thelocking lever.

5. The combination with a talking machine mo'tor, of braking meanstherefor, a spindle adapted to rock and actuate said braking'means, alatch lever rigidly mounted on said spindle, a locking lever to engagesaid latch lever when said spindle is in brake release position, aspring connecting the latch lever and the locking lever and held attension when the locking lever is inloc king engagement with the latchlever, and an adjustable lever disposed in the path of a movingpart ofthe machine to be actuated there by for disengagingthe locking leverfrom the latch lever and permitting the spring to swing the latch'leverand rock the spindle for applying the brake. 7

1 M MARTIN NYSTROM. W'itnesses: p

' WM. F. BELT,

M. A. Kama.

